LINN-SJUS. 277 



17. Didelphis, the opossum : 5 species. 



18. Talpa, the mole : 2 species. 



19. Sorex, the shrew : 5 species. 



20. Erinaceus, the hedgehog : 3 species. 



The fourth order, Glires, Gnawing Animals : — 



21. Hystrix, the porcupine : 4 species. 



22. Lepus, the hare : 4 species. 



23. Castor, the beaver : 3 species. 



24. Mus, rats and mice : 21 species. 



25. Sciurus, the squirrel: 11 species. 



26. Noctilio : 1 species. 



The fifth order, Pecora, the Ruminating Ani- 

 mals : — 



27. CameluSy the camel, dromedary, lama, and alpa- 

 ca : 4 species. 



28. Moschus, the musk : 3 species. 



29. Cervus, the deer : 7 species. 



30. Capra, the goat: 12 species. 



31. Ovis, the sheep : 3 species. 



32. Bos, the ox tribe : 6 species. 



The sixth order, Bellu^e, contains, — 



33. Equus, the horse, ass, and zebra : 3 species. 



34. Hippopotamus : 1 species. 



35. Sus, the hog tribe : 5 species. 



36. Rhinoceros : 1 species. 



The seventh order, Cete, the Whales, consists of 

 four genera : — 



37. Monodon, the narwhal, or sea-unicorn : 1 species. 



38. Balana, the whale, properly so called : 4 species. 



39. Physeter, the cachalot : 4 species. 



40. DelpUnus, the dolphin : 3 species. 



